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这是从Pro/MECHANICA的帮助文档里摘录下来的,希望对你有帮助
找了好久,这是材料力学力应力命名和Pro/MECHANICA中的区别
我简单翻译一下
If you are trying to relate the stress results or stress measures reported by native mode Structure to textbook examples, you may find that Mechanica expresses stress component direction somewhat differently than your textbook.
如果你对比结构分析和教科书的应力结果,你可能会发现Pro/MECHANICA应力方向与你的教科书力有点不一样。
The diagram below describes the directions of the stress components in a standard textbook application.
下图表示了标准教科书力的应力方向
The following items explain the relation between the textbook definition of stresses and the values reported by Structure:
下面解释他们和结构应力报告中的关系:
Textbooks commonly denote normal stresses by the symbol and a subscript indicating the plane on which the stress acts. A normal stress is positive if it is tensile. Structure denotes the normal stresses in Structure as Stress XX, Stress YY, and Stress ZZ.
教科书通常用符号(+,-)和脚标表示平面的法向应力(X,Y,Z)。如果是拉应力,则该应力为正。结构分析则用相应的XX,YY,ZZ应力表示。
Textbooks commonly denote shear stresses by the symbol and two subscripts. The first designates the plane on which the shear stress acts and the second indicates the coordinate axis to which it is parallel.
教科书通常用符号和两个脚标表示剪应力。这点和结构分析相同,即第一个字母表示该力在哪个面上,第二个字母表示这个剪应力平行的轴(如XZ,表示剪应力在X截面(垂直于X轴的平面)并且和Z轴平行,正向与Z轴方向一致)。
The sign of a shear stress depends on the normal of the plane on which it is acting. If the outward normal is positive, the shear stress is positive when it points in the positive direction of the coordinate axis which it parallels. If the outward normal is negative, the shear stress is positive when in points in the negative direction of the coordinate axis which it parallels.
剪应力符号的确定于它所在平面法向有关。如果该平面法向为正,如XY,XZ。则当剪应力方向与跟它平行的轴相同,则为正。反之为负。例如:在X反方向的平面里,XY,XZ的值就为负。(个人理解的,:))
Structure denotes the shear stresses as Stress XY, Stress XZ, and Stress YZ. The other three shear stress components follow these equivalent relations:
结构分析以XY,XZ,YZ显示剪应力。其他方向的剪应力参照下面的等式。
Stress XY = Stress YX
Stress XZ = Stress ZX
Stress YZ = Stress ZY
[ 本帖最后由 cccsss 于 2009-4-2 17:24 编辑 ] |
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